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User Guide to Safety

3129 Series Phase Detector

Did you know that common

phase checkers and detectors

pose electric shock and short-

circuit hazards?

This means:

The traditional phase detection approach

known as direct voltage input lets you

de t e c t volt a ge o nly by c lipp in g th e

instrument’s metallic clips to the exposed

metallic parts of electrical conductors and

breakers.

This also means:

Although certain direct voltage input

type phase detectors incorporate

fuses into the voltage cables, these

instruments rely upon the same

phase detection method—connection

to the exposed metallic part of an

electrical conductor—and

fail

eliminate

electric shock

and

short-

circuit hazards

Technicians involved in performing

electrical work and checking wires

have called for the development of

a safe phase detector that bypasses

the danger and fear caus ed by

the need to make a connection to

the exposed metallic parts of an

electrical conductor.

The HIOKI

3129-10 is rated

CAT IV 600V -

the Top of Its

Class

Introducing

The SAFEST Approach

to to

Phase Sequence Testing:

Non-metallic contact phase detectors like the HIOKI

3129 have debuted in the market in recent years

in response to these calls, offering unmatchable

advantages and dramatically improving safety for

technicians involved in performing electrical work and

checking wires.

The phase detector’s metallic clip may

come into contact with adjacent bare

conductors or exposed metallic parts.

Summary of content (4 pages)

PAGE 1
User Guide to Safety 3129 Series Phase Detector Did you know that common phase checkers and detectors pose electric shock and shortcircuit hazards? The traditional phase detection approach known as direct voltage input lets you d e t e c t vo l t a g e o nl y by c lip p in g t h e instrument’s metallic clips to the exposed metallic parts of electrical conductors and breakers. This means: The phase detector’s metallic clip may come into contact with adjacent bare conductors or exposed metallic parts.
PAGE 2
Similar to voltage detectors, non-metallic contact phase detectors like the HIOKI 3129 use voltage clips without exposed metal that employ the principle of electrostatic induction. Advantage 1 Advantage 2 Phase sequence can be checked by Abs simply clamping the clip around the insulation of the conductor being measured. This prevents the danger of the te c hnic ian c oming into contact with the metallic part of either the phase detec tor or the conductor being measured.
PAGE 3
r Hot Checking whether wires are hot (voltage detection) before Check fo performing phase detection is essential when using a none r o f e B s metallic contact phase detector. As described in the technical e r Wi r abstract, non-contact phase detectors require that each o f Detecting be hot due to their use of the principle of electrostatic nce ! phase e u q e induction with the conductor to detect phase, so open phase S e Phas situations are not proper for detecting correct phase sequence.
PAGE 4
Non-contact phase detectors are the SAFEST way to detect phase sequence especially in high voltage environments where work safety is of utmost concern. When using a non-contact phase detector: ∆ Exercise caution regarding open phases ∆ Check for faulty wiring connections ∆ Stay clear of coaxial cable target conductors When an electrical conductor is open-phase, capacitive coupling with the adjacent conductor (hot wire) induces a voltage in the open-phase conductor.